Finding the Fourth Proportional to 52,442.28, 78,661.98 and 12,998.52

Step by Step Solution

1. Step 1: Write the proportion equation
   52,442.28 : 78,661.98 = 12,998.52 : x
2. Step 2: Convert to fraction form
   52,442.28/78,661.98 = 12,998.52/x
3. Step 3: Cross multiply
   52,442.28x = 78,661.98 × 12,998.52
4. Step 4: Simplify right side
   52,442.28x = 1,022,489,320.27
5. Step 5: Solve for x
   x = 1,022,489,320.27/52,442.28
6. Step 6: Final answer
   x = 19,497.42